What is the current water temperature in Holyhead?

Q: What is the current water temperature in Holyhead?

As of now, in Holyhead, the water temperature is 11.87°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

United Kingdom > Holyhead

Water temperature in Holyhead

Detailed information about the current water temperature in Holyhead. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

53.4

°F

May 25, 13:37

Trend:

increasing

Yesterday:

53.0°F

Tomorrow:

53.6°F

Sunrise:

05:05

Sunset:

21:26

Day Length:

16 h. 21 min.

Holyhead in June

Minimum:

47.4°F

Average:

49.0°F

Maximum:

50.3°F

Sea water temperature in Holyhead today

As of now, in Holyhead, the water temperature is 53.4°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 0.9°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 53.9°F on 2025, while the historical minimum was 51.1°F on 2018.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 54.1°F, with minimum temperature starting at 53.6°F, while the maximum might reach 54.6°F.

Daily water temperature in Holyhead

Date	Current Year actual* / forecast**	last year	10 years average
May 11	51.7°F	52.0°F	50.5°F
May 12	51.9°F	52.3°F	50.8°F
May 13	51.9°F	52.9°F	51.1°F
May 14	51.9°F	53.5°F	51.2°F
May 15	51.7°F	53.5°F	51.3°F
May 16	51.7°F	53.4°F	51.4°F
May 17	51.1°F	53.6°F	51.4°F
May 18	51.1°F	53.8°F	51.5°F
May 19	51.0°F	53.8°F	51.5°F
May 20	51.8°F	54.2°F	51.9°F
May 21	51.7°F	53.6°F	52.0°F
May 22	51.9°F	54.1°F	52.1°F
May 23	52.2°F	54.3°F	52.3°F
May 24	53.0°F	54.1°F	52.5°F
May 25	53.4°F	53.9°F	52.5°F
May 26	53.6°F	54.6°F	52.8°F
May 27	53.8°F	55.1°F	52.9°F
May 28	53.9°F	54.9°F	53.0°F
May 29	54.1°F	54.7°F	53.2°F
May 30	54.3°F	55.0°F	53.4°F
May 31	54.5°F	55.3°F	53.6°F
Jun 1	54.6°F	55.6°F	53.7°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Holyhead by month

In an average year, Holyhead offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Holyhead was recorded on August 29, 2025, reaching a 63.3°F. While the coldest temperature occurred on March 9, 2018, dipping to 43.0°F. The average readings by season are 48.5°F in Winter, 48.7°F in Spring, 58.2°F in Summer, and 57.9°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Caernarfon	56.4°F	19mi
Bangor	55.5°F	21mi
Conwy	56.2°F	33mi
Douglas	52.1°F	59mi
Aberystwyth	58.4°F	66mi

* current water temperature in this city

** straight line distance from Holyhead